Shiva Purana
लिंगमॐकारमंत्रेण बेरं पंचाक्षरेण तु । स्वयमेव हि सद्द्रव्यैः प्रतिष्ठाप्यं परैरपि ३८ ।
The others too shall install the phallic form with Oṃkāra mantra and the embodied form with the five-syllabled mantra, with excellent articles of worship and adore with due homage.
english translation
liMgamaOMkAramaMtreNa beraM paMcAkSareNa tu । svayameva hi saddravyaiH pratiSThApyaM parairapi 38 ।
hk transliteration by Sanscript